Multi-Layer Switch Array for Semiconductor Signal Reading
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing semiconductor devices face challenges in efficiently processing and reading pixel signals due to parasitic capacitance and resistance issues in multi-layer switch configurations, which hinder high-speed signal reading.
Innovation Solution
The semiconductor device employs a multi-layer switch array configuration with optimized signal line layouts and switch connections, reducing parasitic capacitance and resistance by adjusting switch distances and signal line widths, allowing for faster pixel signal reading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple group selection switches are arranged in parallel to handle multiple column groups, then the signal reading capability is improved, but the parasitic capacitance on the horizontal signal line increases
Solution Approach 1:
The horizontal signal line is divided into multiple separate signal lines, with each signal line serving a specific group selection switch. This segmentation prevents the accumulation of parasitic capacitance on a single shared line while maintaining the ability to read signals from multiple column groups simultaneously.
Solution Approach 2:
The patent transitions from a single-dimensional signal line architecture to a multi-dimensional architecture by introducing multiple horizontal signal lines at different levels. This allows group selection switches to be connected to dedicated signal lines, reducing parasitic capacitance effects while preserving signal reading capability.
2Speed
If signal lines are made wider to reduce resistance, then the signal transmission speed is improved, but the parasitic capacitance increases
Solution Approach 1:
Instead of using a single wide signal line that would have high parasitic capacitance, the patent segments the signal transmission path into multiple narrower signal lines. Each signal line has lower parasitic capacitance, and the parallel arrangement maintains low resistance for fast signal transmission.
Solution Approach 2:
The patent changes the electrical parameters of the signal lines by adjusting their width and arrangement. Multiple narrower lines are used instead of fewer wider lines, optimizing the balance between resistance and parasitic capacitance to achieve fast signal transmission.
3Productivity
If more switches are added to handle more pixel columns, then the processing capacity is improved, but the device complexity increases
Solution Approach 1:
The patent resolves the complexity issue by organizing switches into a multi-layered three-dimensional architecture. Column selection switches and group selection switches are placed in different layers, with systematic connection patterns. This structured approach manages the complexity of handling many pixel columns while maintaining high processing capacity.
Solution Approach 2:
The patent designs the switch architecture with universal connection patterns where switches in different layers serve multiple functions. The same structural pattern can handle different numbers of column groups, making the design scalable and reducing the perceived complexity through regularity.
Data Source
AI summary
A semiconductor device includes a pixel array, a plurality of column circuits, an amplifier, switch arrays of a first layer to an nth layer, and signal lines of the first layer to the nth layer. n is an integer of two or more. The switch array of an ith layer is disposed between the switch array of an (i+1)th layer and the amplifier. i is an integer of one or more and less than n. The signal line of the first layer is connected to the nth amplifier. The signal line of the nth layer is connected to the switch array of the nth layer. Each of the plurality of switches included in the switch array of the nth layer is connected to the column circuit.